#!D:/Python27/python
# Filename:using_dict.py

# 'ab' is short for 'a'ddress'b'ook
ab={    'Swaroop':'swaroop@byteofpython.info',
        'Larry':'Larry@wall.org',
        'Matsumoto':'matz@ruby-lang.org',
        'Spammer':'spammer@hotmail.com'
}
print "Swaroop's address is %s"%ab['Swaroop']

#Adding a key/value pair
ab['Guido'] = 'guido@python.org'

#Deleting a key/value pair
del ab['Spammer']

print'\nThere are %d contacts in the address-book\n'%len(ab)
for name,address in ab.items():
    print 'Contact %s at %s'%(name,address)

if 'Guido' in ab:#OR ab.has_key('Guido')
    print "\nGuido's address is %s"%ab['Guido']
